JP2924688B2 - Connection structure between electrical junction box and electronic circuit unit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connection structure between an electric junction box and an electronic circuit unit. More specifically, a terminal on the electronic circuit unit side to be inserted into and connected to a tab of a bus bar on the electric junction box side can be manufactured at low cost. Is to do so.

[0002]

2. Description of the Related Art An electrical junction box used for branch connection of an automobile wire harness or the like to various electric components has a branch connection point concentrated at one place, and the wiring is rationally and economically connected. With the increase in the density of wire harnesses, various types have been developed according to vehicle types or applications.

[0003] As the electric junction box 1 as described above, FIG.
As shown in FIG. 6, the upper cover 2 and the lower cover 3
And a unit fitting portion 2a for fitting the electronic circuit unit 4 from above to the inside on the upper surface of the upper cover 2.
And a connector fitting portion 2b for fitting the connector housing 5 of the electronic circuit unit 4 inward from above is provided inside the unit fitting portion 2a.

[0004] In the space between the upper cover 2 and the lower cover 3, bus bars 7,.
7 are stacked and accommodated, and flat tabs 7a,..., 7a projecting into the connector fitting portion 2b from the slit-like opening 2c on the upper surface of the upper cover 2 are bent and formed in the bus bar 7. ing.

The electronic circuit unit 4 is shown in FIG.
As shown in (B), the upper cover 8 and the lower cover 9
When the upper cover 8 is put on the lower cover 9 and the lock holes 9 a of the upper cover 8 are engaged with the lock claws 9 a of the lower cover 9, the upper cover 8 is locked on the lower cover 9.

In the space between the upper cover 8 and the lower cover 9, a printed board 10 having a circuit 10 a formed on the lower surface on the lower cover 9 side is accommodated.
0 slit-shaped hole 10b on the upper surface of the upper cover 8 side
, A rear end 11a of the terminal 11 is inserted into the rear end 1a.
1a is joined to the lower circuit 10a by soldering a or the like. The tip of the terminal 11 is formed on a female electrical connection portion 11b which is bent by a press or the like. Terminal 1 above
The semi-circular spring portion 11d formed in the middle portion of No. 1
When the female electrical connection portion 11b of the terminal 11 is inserted and connected to the tab 7a of the bus bar 7, the force acting on the portion of the soldering a can be dispersed and the force at the time of connection with the tab 7a can be dispersed. Is what you do.

The female electrical connection portion 11b of the terminal 11
The lance portion 5a of the connector housing 5 protrudes into the connector housing 5 and engages with the hole 11c of the female electrical connection portion 11b to be held at a predetermined position.

When the electronic circuit unit 4 is fitted into the unit fitting portion 2a of the electric connection box 1 from above with the upper cover 8 facing downward as shown by an arrow b in FIG. 4 is fitted into the connector fitting portion 2b of the electric connection box 1 from above, and
Female electrical connection portion 11b of terminal 11 of electronic circuit unit 4
Are inserted and connected (the state of FIG. 6).

[0009]

However, since the female electrical connection portion 11b at the tip of the terminal 11 on the electronic circuit unit 4 needs to be bent by a press or the like, the production cost increases. is there.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and an electric connection box and an electronic circuit unit, which can be manufactured at low cost, can be manufactured at low cost for terminals on an electronic circuit unit to be inserted and connected to tabs of a bus bar on the electric connection box. It is an object of the present invention to provide a circuit unit connection structure.

[0011]

In order to achieve the above-mentioned object, the present invention provides an electric connection box, comprising: a front end of a tab of a bus bar exposed to the outside through an opening of a cover of an electric connection box; In the connection structure for inserting and connecting the ends of the terminals exposed to the terminal, the terminal on the electronic circuit unit side is formed in a tab, and the tab on the bus bar on the electric connection box side and the tab on the terminal on the electronic circuit unit side are orthogonal to each other. And a connection structure between the electric connection box and the electronic circuit unit, wherein a slit-shaped press-contact groove for inserting the tip of the other tab is formed at the tip of one of the tabs. Is what you do. It is preferable that the slit-shaped press contact groove is formed at the tip of the tab of the bus bar on the side of the electric connection box. (Claim 2)

[0012]

According to the present invention, the terminal on the electronic circuit unit side is formed on the same tab as the tab on the electric connection box side, and a slit-shaped terminal formed on one end of the tab, for example, the tip of the tab on the electric connection box side. The tabs on the side of the electronic circuit unit are inserted perpendicularly into the press-contact grooves of (1) and connected. As a result, the tab and the press-contact groove on the side of the electric connection box can be manufactured in the same process as the conventional one, so that the cost is not increased. In addition, the tab on the side of the electronic circuit unit is bent by a press or the like. The material cost and the manufacturing cost are significantly lower than the parts.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments. Note that the same components and operations as those in the prior art shown in FIG.

As shown in FIG. 1, in the space between the upper cover 2 and the lower cover 3 of the electric junction box 1, bus bars 12,... The bus bar 12 has flat tabs 12a,..., 12a projecting from the slit-like opening 2c on the upper surface of the upper cover 2 into the connector fitting portion 2b. As shown in detail in FIG. 2A, each of the tabs 12a is formed to have a width W of about 1.5 times as large as that of the conventional tab 7a (see FIG. 5), and has an orientation. It is inverted at 90 degrees. At the tip of each of the tabs 12a, a slit-shaped press contact groove 12b is formed in a vertical direction.

The slit-shaped hole 1 on the upper surface of the printed circuit board 10 on the upper cover 8 side accommodated in the space between the upper cover 8 and the lower cover 9 of the electronic circuit unit 4.
The rear end 13a of the terminal 13 is inserted into 0b, and is joined to the circuit 10a on the lower surface by soldering a or the like.

As shown in detail in FIG. 2 (B), the terminal 13 has a female electrical connection portion 11b formed by bending at the tip by a press or the like, as compared with the conventional terminal 11 (see FIG. 3). Instead, a tab 13b having a flat plate shape similar to the tab 12a of the bus bar 12 is formed. The tab 13b is disposed so as to intersect the tab 12a of the bus bar 12 in the orthogonal direction.

The terminal 13 has a semicircular spring portion 13d for dispersing the force acting on the soldered portion a when the tab 13b is inserted and connected to the press-contact groove 12b of the tab 12a of the bus bar 12. And a hole 13c for engaging with the lance portion 15a of the connector housing 15 and holding the same at a predetermined position.

With the above structure, referring to FIG. 4, the upper cover 8 is turned downward as shown by the arrow b, and the electronic circuit unit 4 is connected to the unit fitting portion 2a of the electric connection box 1.
The electronic circuit unit 4
Of the tab 13b of the terminal 13 of the electronic circuit unit 4 is fitted into the connector fitting portion 2b of the electric connection box 1 from above and into the press-contact groove 12b of the tab 12a of the bus bar 12 of the electric connection box 1. Are orthogonally inserted and connected (the state of FIG. 1).

As described above, the bus bar 1 of the electric junction box 1
Since the second tab 12a and the press contact groove 12b can be manufactured by the same process as in the related art, the cost does not increase. Further, the tab 13b of the terminal 13 of the electronic circuit unit 4 does not need to be bent by a press or the like unlike the conventional female electrical connection portion 11b, so that the material cost and the manufacturing cost are significantly reduced.

In the above embodiment, the tab 12 of the bus bar 12
Although the press-contact groove 12b is formed in a, the press-contact groove may be formed in the tab 13b of the terminal 13 on the contrary.

[0021]

As is apparent from the above description, in the connection structure of the electric junction box and the electronic circuit unit according to the present invention, the terminals on the electronic circuit unit side are formed on the same tabs as the tabs on the electric junction box side. Then, the tip of the tab on the side of the electronic circuit unit is inserted perpendicularly into a slit-shaped press-contact groove formed at the tip of one of the tabs, for example, the tab on the side of the electric connection box, and connected.

Therefore, the tab and the press-contact groove on the side of the electric connection box can be manufactured by the same process as the conventional one, so that the cost is not increased, and the tab on the side of the electronic circuit unit is formed by a conventional female mold which is bent by a press or the like. Material costs and manufacturing costs are significantly lower compared to electrical connections.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a connection structure of an electric connection box and an electronic circuit unit according to the present invention.

2 (A) is a perspective view of a tab of a bus bar, FIG. 2 (B) is a perspective view of a terminal, and FIG. 2 (C) is a perspective view of a tab of the bus bar in which a tab of the terminal is inserted and connected.

FIG. 3A is an exploded perspective view of a conventional electronic circuit unit, and FIG. 3B is an enlarged perspective view of a conventional terminal.

FIG. 4 is a perspective view of an electric connection box and an electronic circuit unit before connection.

FIG. 5 is a perspective view of a tab of a conventional bus bar.

FIG. 6 is a sectional view of a main part of a conventional connection structure between an electric junction box and an electronic circuit unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electric connection box 2 Upper cover 3 Lower cover 4 Electronic circuit unit 12 Bus bar 12a Tab 12b Pressure contact groove 13 Terminal 13a Rear end 13b Tab

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) H01R 4/26 H01R 4/58 H01R 9/09 H02G 3/16

Claims (2)

(57) [Claims] 1. A connection structure for inserting and connecting a tip of a terminal exposed from an opening of a cover of an electronic circuit unit to a tip of a tab of a bus bar exposed to the outside from an opening of a cover of an electric connection box, The terminal of the electronic circuit unit side is formed in a tab, and the tab of the bus bar on the electric connection box side and the tab of the terminal on the electronic circuit unit side are arranged so as to intersect at right angles, and the tip of one of the tabs And a slit-shaped pressure contact groove into which the tip of the other tab is inserted. 2. The connection structure between an electric connection box and an electronic circuit unit according to claim 1, wherein the slit-shaped press contact groove is formed at a tip of a tab of a bus bar on an electric connection box side.